Pan & Scan: 16x9 HDV Sequence to 4x3 SD-DVD (Newbie)

I am struggling through the process of giving a client a 4x3 (NON-letterboxed) SD-DVD of a 16x9 HDV sequence. I've tried several approaches, none of which is perfect. However, I think I'm on the home stretch.

I have "dropped" my final HDV sequence from the Browser into a new 4x3 NTSC TV sequence. All the clips are now fused into one big clip -- the clip of my original sequence. I am re-rendering it as we speak.

I now plan to "pan and scan" -- adjust the shots to get the center 4x3 image framed properly so I can export it to Compressor and (hopefully) come out with a true, high-quality (though SD) 4x3 movie to burn to DVD in DVD SP. However, a troubling thought has just occurred to me: I assumed that individual clips would need specific pan and scan adjustment to work in the 4x3 aspect ratio. But if my whole sequence has been turned into one giant clip, how do I do that?!

Either I was wrong to drop my 16x9 HDV sequence from the browser into the new 4x3 sequence timeline, or the pan and scan is somehow applied once to the entire sequence. Or -- and this is the scariest thought of all -- I have to go into the sequence with the razor blade tool and chop my new sequence up into clips again, so I can custom-tailor the panning and scanning to each image.

I would appreciate some clear guidance on this troubling development.

Thanks!